| Tommy Nelson | |
| Position: | Third baseman/Second baseman |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 1 May 1917 |
| Birth Place: | Chicago |
| Death Place: | San Diego, California |
| Debutleague: | MLB |
| Debutdate: | April 17 |
| Debutyear: | 1945 |
| Debutteam: | Boston Braves |
| Finalleague: | MLB |
| Finaldate: | September 30 |
| Finalyear: | 1945 |
| Finalteam: | Boston Braves |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .165 |
| Stat2label: | Home runs |
| Stat2value: | 0 |
| Stat3label: | Runs batted in |
| Stat3value: | 6 |
| Teams: | |
Tom Cousineau Nelson (May 1, 1917 – September 24, 1973) was a Major League Baseball infielder who played for the Boston Braves in 1945. The 28-year-old rookie was a native of Chicago.
Nelson is one of many ballplayers who only appeared in the major leagues during World War II. He made his major league debut on April 17, 1945 (Opening Day), against the New York Giants at Braves Field. In 40 games he hit .165 (20-for-121) with 6 runs batted in and 6 runs scored, and his fielding percentage in 114 total chances was .904.
He died in 1973 in San Diego, California.